James walker



(No Model.)

J. WALKER.

ROD PACKING.

Patented Mar. 1'7, 1896 INVENTOH ATTORNEYS.

UNITED STATES PATENT OFFI E.

JAMES IVALKER, OF LONDON, ENGLAND.

ROD-PACKING.

SPECIFICATION forming part of Letters Patent No. 556,600, dated March 1'7, 1896. Application filed August 20, 1895. Serial No. 559,945. (No model.) Patented in England J'u'ne 8, 1894, No. 11,142.

To all whom it may concern.-

Be it known that 1, JAMES WALKER, of Shadwell, London, in the county of London, England, have invented a new and Improved Rod-Packin g, (patented in Great Britain June 8, 1894, No. 11,142,) of which the following is a full, clear, and exact description.

The object of this invention is to provide an improved rod-packing and one in which the construction and arrangement of the packing material are such as to produce a more effective action on the rod, and thus increase the efficiency of the packing.

To this end the invention consists principally in a packing having a loose portion or fiap arranged to engage the rod and to have a binding or cone-like action thereon, and which is also so related to the other part of the packing as to form a baffle-space for the steam, to receive and confine the same and prevent it from escaping, all as hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a cross-section of the preferred form of the packing. Fig. 2 is a fragmentary side elevation thereof. Fig. 3 is a cross-section of a modification. Fig. 4 is an elevation of the same. Fig. 5 is a cross-section of a further modification. Fig. 6 is a side elevation of the form shown in Fig. 5. Figs. 7, 8, 9, 10, 11, 12, 13, 14, and 15 are sectional views of further modifications; and Fig. 16 is a sectional view through a packing-gland and showing the improved packing therein.

Referring to Figs. 1 and 2, the packing there illustrated is formed of a single sheet of soft material, preferably asbestos, asbestos wirecloth, canvas cloth, hemp, vulcanized fiber, wire-gauze, sheet metal or the like, proofed to resist the action of steam, water, or any chemicals which it may have to contend with, and folded into alternate or bellows-like layers so as to lie one upon the other, and this folding is so arranged that the packing will assume substantially a rectangular shape in cross-section and so that a fiap or loose portion a will be left, the same being narrower than the thickness of the main part and forming a baffie-space b.

The folds of the packing are held together by means of the rivets c, which are preferably formed with enlarged heads 0, these being arranged on the wearing side of the packing so as to form a hard wearing-surface therefor and add to the durability of the packing.

If so desired, auxiliary rivets 01 may be employed and passed through that portion of the packing which is located laterally (or exteriorly) of the flexible upper end of the flap a, but these are not absolutely necessary.

Additional rivets 0 may be employed and passed through the main part of the packing, as shown in Fig. 2, if so desired, and these may be made to extend entirely through the layers or to lie beneath the first layer, in which latter position they are illustrated in the said figure.

The form of my invention illustrated in Figs. 3 and 4 embodies a loose flap a and a baffle-space b, the outer side of said space being inclined outwardly and inwardly, so as to give the space substantially a triangular form. In this view the rivets 61 may be provided with longitu dinally-elongated heads, as shown. The upper surface of the flap is arranged at an acute angle to the inner or contact surface thereof.

Figs. 5 and 6 show a second modification, and here the fiap a is formed in substantially the same manner as in Fig. 3, and another flap, a, is located on the outer side of the body a of the strip, so that baffle-spaces b and b will be left at each side, the space I) being the larger. This construction affords a bafflespace, Z), at the outer edge of the packing, and may be employed with advantage when the stuffing-box is very defective, as in such a case the steam is liable to get down to the back or outside of the packing.

In Figs. 5 and 6 the strip of material composing the packing is returned across the outer side of the strip, as shown at e, and the extremity so designated is passed inwardly alongside of the strip and lies just inside of the adjacent extremity e. In Fig. 6 the rivets c are provided with longitudinally-elongated heads having bias and directly contiguous ends, which form in the packing two unbroken metallic strips serving to lend rigidity to the packing. These rivets are also shown in Fig. 7, which is a cross-sectional view of a modified construction in which the packing is formed of a single piece of material folded so that the body or main portion of the packing will be inclosed by the extremity e of the material, said flap forming the bathe-space b.

Fig. 8 shows the packing constructed of a single piece of material and forming the flap a square, as well as the baffle-space b, the usual rivets being provided to hold the parts together.

Fig. 9 illustrates a form constructed by rolling the material and pressing it so that a diagonal side I) will be provided, the flap being formed by the part f in Fig. 9. In this figure the dotted lines represent a superposed strip, and this is to be arranged so as to form the baffle-space b.

Fig. 10 is similar to Fig. 1, except that the material is folded in an opposite direction so as to form the flap a and baffle-space l), and in this view the dotted lines also represent a superposed section of the packing.

Fig. 11 shows a form in which the flap to is projected farther beyond the main part than in the preceding figures, and in which the flap has an inclined face 9 forminga substantially triangular bafflespace b.

Fig. 12 shows the body or main part and the flap a of the packing formed by rectangularsuperposed layers and having a strip h secured at one side and forming the bafflespace I), as will be understood.

Figs. 13, 14 and 15 show the use of a spring plate to lend resiliency to the flap, and in Fig. 13 a, and b respectively indicate the flap and baffle-space, and ma spring-plate interposed between two layers and giving the flap a tendency to move against the rod or other part to be packed, the flap when free projecting away from the main portion, as shown.

In Fig. 14: a substantially V-shaped spring is employed, one arm lying against the flap a and the other against the body portion and the baiiie-space I) being formed by the space between the extremities of the spring.

Fig. 15 shows a spring 75 having inwardlybent edges Z, which have the flaps a respectively secured thereon by rivets, and these flaps form the usual baffle-space b, as will be understood.

From the description of Figs. 13, ll, and 15 it will be seen that strips of metal may be wound into the parts or folds of the packing to lend rigidity or resiliency thereto, as may be desired.

Fig. 16 shows the packing applied in a gland, and there it will be seen that the flaps a are arranged to embrace the rod m, which reciprocates through the gland m, and in this arrangement the spaces 19 form receptacles or chambers into which the steam or other fluid in the cylinder 07. may be received and confined, while the fiaps a, being loose, have a binding or cone-like action on the reciprocating rod, the whole tending to produce a packin g in which there is the maximum degree of tightness and a minimum degree of friction.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. A packing whose contact-face comprises a metallic wearing-surface and a yielding flap in the continuation of said surface, substantially as described.

2. A packing, consisting of a sheet of material folded to form superposed layers, and formed at its inner or contact surface with a flap whose width is smaller than that of the outer surface of the packing, and rivets extending through the folded material to the inner contact-surface thereof and forming a metallic wearing-surface, substantially as described.

3. A packing composed of a sheet of material folded to form superposed layers, part of which are longer than the others, forming a loose fiap projected away from the main or body portion of the packing and also forming a baflle space contiguous to the flap, and means for holding the layers together, substantially as described.

4. A packing composed of a single sheet of material folded to form superposed layers, part of which are longer than the others, so as to form a loose flap projected away from the main or body portion of the packing and also to form a baffle-space directly contiguous to the flap, and rivets passing through the layers and holding them together, sub stantially as described.

5. A packing having a loose flap projected away from the main or body portion, and a section of spring metal combined with the packing, substantially as described.

JAMES YVALKER.

itnesses:

GEORGE H. 0001:, GEORGE II. WIsHER. 

